Are you using it for engineering purposes? Mechanical design? Or are you looking to use it for modelling, design and higher detailed prints? There are different printers for different applications.

For instance, if you are looking for a machine to print highly detailed smaller models, then you would probably want to look at an SLA or Project style printer. Build volumes on these though tend to not exceed 4" or so. They also have some post processing that is required afterwards, and depending on your companies EH+S standards they may not take kindly to wash stations and ultra-sonic cleaners (as is our case)

Alternatively, if you're looking to print larger items for mechanical purposes, then you could consider anything from a Ultimaker 2 Extended, to a low end Stratasys machine.

If you could give an example of what you want to make with it, then we can tailor a printer to meet that. A resin style printer is great for small, high resolution prints, but not for large items, and the opposite is true for FDM style machines too.